#include <stdio.h>
#define RATE1 0.13230
#define RATE2 0.15040
#define RATE3 0.30025
#define RATE4 0.34025
#define BREAK1 360.0
#define BREAK2 468.0
#define BREAK3 720.0
#define BASE1 (RATE1 * BREAK1)
#define BASE2 (BASE1 + (RATE2 * (BREAK2 - BREAK1)))
#define BASE3 (BASE1 + BASE2 + (RATE3 * (BREAK3 - BREAK2)))
int main(void)
{
	double kwh;
	double bill;
	
	printf("Please enter the kwh used.\n");
	scanf("%lf", &kwh);
	if (kwh <= BREAK1)
		bill = RATE1 * kwh;
	else if (kwh <= BREAK2)
		bill = BASE1 + (RATE2 * (kwh - BREAK1));
	else if (kwh <= BREAK3)
		bill = BASE2 + (RATE3 * (kwh - BREAK2));
	else 
		bill = BASE3 + (RATE4 * (kwh - BREAK3));
	printf("The charge for %.1f kwh is $%1.2f.\n", kwh, bill);
	
	return 0;
}